Electric-fuse holder



Feb. 20, 1923.

11v VENTOR .E'owano V GLUCK x A TTORNEY E. V, GLUCK.

ELECTRIC FUSE HOLDER.

FILED APR 16 1920 Patented Feb. 20, 1923.

UNITED STATES PATENT OFFICE.

EDWARD V. GLUCK, OF WOODHAVEN, NEW YORK.

ELECTRIC-FUSE HOLDER.

Application filed April 16, 1920; Serial No. 374,278.

present invention has inview are: to facilitatethe handling of'electric fuses and particularly those known as cartridge fuses; to avoid injury to the operator when installing or removing fuses of the character mentioned; and to simplify and cheapen the construction' of fuses of the character mentioned.

Drawings.

Figure 1 is a perspective view of a cartridge fuse equipped with a holder constructed and arranged inaccordance with the present invention;

Figure 2 is a similar view on enlarged scale showing a modified form of the holder;

Figure 3 is a similar view showing a holder having a further modified form.

Figure 4 is a cross section of a fuse and holder, the section being taken as on the line 44 in Fig. 1. I

Figure 5 is a cross section, the section being taken on the line 5-5 in Fig. 2.

Figure 6 is a cross section, the section being taken as on the line 6-6 in Fig. 3.

Figure 7 is. a view showing the blank from which the simplified form of the holder is constructed.

Figure Sis a perspective view of a cartridge fuse having a holder permanently attached therewith, in accordance with the modified form of the invention. I

Figure 9 is across section of the same, the section being taken at the center of the cartridge, and showing only the shell, the fuse wire and protective filling being omitted.

Description.

Heretofore cartridge fuses have been provided with body portions 11 constructed of cardboard, fiber, and the like having metal ferrules 12 at both ends. The ferrules 12 have been employed for making electric con tact with expansible clips with which the usual fuse box is furnished. Suitable fuse wire has united the ferrules 12, said fuse wire being calculated to the current to control which the fuse is employed. When the current has been greater than allowed for, the fuse wire within the body portion 11 has been consumed, and the body 11 partially.

destroyed. This operation is known as fuse blowing. In the blowing of the fuse the fuse wire which usually is constructed of lead, is heated to-the melting point, in which process the body of the fuse becomes very hot, and a person undertaking to remove the fuse is 'apttobe burned in the, process.

Knowing this, the operatoris apt to attempt,

to remove the fuse by making short, quick efforts to that end, usually resulting in his fingers slipping and in the end delaying the operation of removing thefuse. Another danger to the operator has existed in that if the master switch be thrown on, the line connecting the fuse box with the supply mains not being open, the operator is apt to bridge with his fingers the distance between the ferrules 12 which are in contact with the spring clips, resulting in a severe shock, and possibly an equally severe burn to the operator. The nervousness occasioned by these possibilities renders the removing of a fuse under certain conditions rather trying.

It is desirable to remove and install these fuses without interferingwith the main electric supply, for the reason that although one fuse maybe blown with resultant impairment of the circuit in which it is incorporated, other fuses and circuits with which they are associated are in good working condition, and it is an inconvenience to inter: rupt the service.

The present invention has undertaken to obviate these difficulties by providing the holder shown in the drawings, which in all of its forms is constructed preferably of hard rubber, or fibre board. The fibre board is cut to form a holder having grip sections 13 and side bars 1 1. The bars 14 are. preferably formed by cutting from the center of the blank the rectangular opening 15. This blank is shaped as seen best in Figures 1 and 2, to form the collars 16 and the offset portions 17, to remove the grip sections 13 from the body 11 of the fuse. The finger space 18 thus formed between the grip sections 1.3 andthe body 11 of the fuse furnishes a place wherein the fingers of the operator may be hooked to positively withdraw the fuse from its service position. It is obvious, however, that the handle may be profitably employed when placing the fuse in service, the holder affording easy and safe. means for manipulating the said fuse.

The modification shown in Figure 2 of the drawings consists in providing two upturned fenders 19. As shown best in Figure 5 of the drawings, these fenders 19 extend to both sides and operate to prevent the accidental approach of the fingers of the operator to the body 11 of the fuse, which may be, as indicated above, hot enough at the time when it is desired to remove the fuse, to burn the fingers. The space 18 provided in the form shown in Figure 1 is in this modified form provided between the outer end of the grip 13 and the fenders 19.

A further modification in this embodiment of the invention is in the use of eyea let rivets 20, whereby the lapped portions of the holder are held in service relation.

In the modified form shown in Figure 3, the rivets 20 are dispensed with, and in place thereon a tongue 21 formed of the material which in the form shown in Figure 2 is cut out of the space 18. The tongue 2] is extended through the space 18 of the opposite end of the holder, and is overturned thereon adjacent the fenders 19 thereof.

In the modified form of the invention shown in Figures 8 and 9, the holder 22 is formed from a blank which is folded upon itself, the said blank being provided with openings 23 at each side of the median line, or line of fold 24. One portion of the blank has a tongue 25 which is extensible through the opening 23 of the other half of the blank. Said other half has the portion 26 which may be shaped to correspond with the portion 25, said portions 25 and 26 resting upon the shell of the body portion 11. Rivets 27 are employed to retain the modified holder in position.

Ulac'ms.

1. A holder for cartridge fuses comprising a one-piece grip member adapted for positive clamping engagement around the insulated portion of a cartridge fuse adjacent the ends thereof.

2. A fuse holder comprising a grip member adapted to be secured on a fuse in spaced parallel relation with respect thereto, and spaced collars carried by said grip member and adapted for clamping engagement with the fuse at opposite sides of the transverse center thereof, said grip member and collars being formed of an insulating material.

3. A holder for cartridge fuses comprising a grip member adapted to be secured on the insulated portion of a cartridge fuse in spaced parallel relation with respect there to, and a plurality of spaced collars carried by said grip member and adapted for clamping engagement with the insulated portion of the fuse.

a. A holder as characterized comprising form collars adapted for encircling engagement with the body portion of a fuse; and. straight offset portions for disposing said grip sections in spaced relation to the body of the fuse.

5. A holder as characterized comprising an elongated structure having relatively narrow side bars and grip sections, and said side bars being shaped to form collars adapted for encircling engagement with the body portion of a fuse; offset portions for dis posing said grip sections in spaced relation to the body of the fuse; and a plurality of fenders offset from said offset portions to prevent accidental contact of the fingers of" an operator with the body of the fuse.

6. A holder as characterized comprising an elongated structure having relatively narrow side bars and grip sections, said side bars and grip sections being integrally formed, and said side bars being shaped to form collars adapted for encircling engagement with the body portion of a fuse; straight offset portions for disposing said grip sections in spaced relation to the body of the fuse; and means for holding the grip sections and offset portions fixedly united.

7. A holder as characterized comprising an elongated structure having relatively narrow side bars and grip sections, said side bars and grip sections being integrally formed, and said side bars being shaped to form collars adapted for encircling engage-- ment with the body portion of a fuse; straight offset portions for disposing said grip sections in spaced relation to the body of the fuse; and means for holding the grip sections and offset portions fixedly united, said means embodying rivetlike members extending through said offset members.

8. A holder as characterized comprising an elongated structure having relatively narrow side bars and grip'sections, said side bars and grip sections being integrally formed and said side bars being shaped to form collars adapted for encircling engagement with the body portion of a fuse;

EDWARD V. GIUUGK. 

